current. The Necaxa is a Class III River. Access From Mexico City, take the Mexico-Tuxpan road and drive to Tulancingo. Then drive to Huauchinango with final destination to "El Salto" (the location of a CFE's hydroelectric plant). References Rivers of Mexico Rivers of Puebla Rivers of Veracruz Trans-Mexican Volcanic Belt Natural resources protection areas of Mexico Ramsar sites in Mexico Protected areas of Hidalgo (state) Protected areas of Puebla Sierra Madre Oriental